US20120048940A1 - Electro-optical reader with enhanced laser light pattern visibility - Google Patents

Electro-optical reader with enhanced laser light pattern visibility Download PDF

Info

Publication number
US20120048940A1
US20120048940A1 US12/868,093 US86809310A US2012048940A1 US 20120048940 A1 US20120048940 A1 US 20120048940A1 US 86809310 A US86809310 A US 86809310A US 2012048940 A1 US2012048940 A1 US 2012048940A1
Authority
US
United States
Prior art keywords
reader
optical element
filter
laser light
laser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US12/868,093
Other versions
US8840027B2 (en
Inventor
Chad Chaumont
Christopher Warren Brock
Ian Jenkins
Jaime WEIDLER
Sunghun Lim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Symbol Technologies LLC
Original Assignee
Symbol Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Symbol Technologies LLC filed Critical Symbol Technologies LLC
Priority to US12/868,093 priority Critical patent/US8840027B2/en
Assigned to SYMBOL TECHNOLOGIES, INC. reassignment SYMBOL TECHNOLOGIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BROCK, CHRISTOPHER WARREN, CHAUMONT, CHAD, JENKINS, IAN, LIM, SUNGHUN, WEIDLER, JAIME
Publication of US20120048940A1 publication Critical patent/US20120048940A1/en
Application granted granted Critical
Publication of US8840027B2 publication Critical patent/US8840027B2/en
Assigned to MORGAN STANLEY SENIOR FUNDING, INC. AS THE COLLATERAL AGENT reassignment MORGAN STANLEY SENIOR FUNDING, INC. AS THE COLLATERAL AGENT SECURITY AGREEMENT Assignors: LASER BAND, LLC, SYMBOL TECHNOLOGIES, INC., ZEBRA ENTERPRISE SOLUTIONS CORP., ZIH CORP.
Assigned to SYMBOL TECHNOLOGIES, LLC reassignment SYMBOL TECHNOLOGIES, LLC CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SYMBOL TECHNOLOGIES, INC.
Assigned to SYMBOL TECHNOLOGIES, INC. reassignment SYMBOL TECHNOLOGIES, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: MORGAN STANLEY SENIOR FUNDING, INC.
Application status is Active legal-status Critical
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10881Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices constructional details of hand-held scanners
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10554Moving beam scanning
    • G06K7/10594Beam path
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K2207/00Other aspects
    • G06K2207/1011Aiming

Abstract

Visibility of a scan laser light pattern or an aiming laser light pattern on a symbol to be read by a hand-held, electro-optical reader is enhanced by directing laser light having a laser wavelength in the laser light pattern to the symbol, configuring an optical element to be transmissive to the laser light of the same laser wavelength, supporting the optical element by the reader, moving the optical element from a stored position to a deployed position, and viewing the laser light pattern on the symbol through the optical element in the deployed position.

Description

    DESCRIPTION OF THE RELATED ART
  • Moving laser beam readers or laser scanners, as well as solid-state imaging systems or imaging readers, have been used to electro-optically read symbols, particularly one-dimensional Universal Product Code (UPC) bar code symbols, each having a row of bars and spaces spaced apart along one direction, and two-dimensional symbols, such as Code 49, which introduced the concept of vertically stacking a plurality of rows of bar and space patterns in a single symbol, as described in U.S. Pat. No. 4,794,239. Another two-dimensional code structure for increasing the amount of data that can be represented or stored on a given amount of surface area is known as PDF417 and is described in U.S. Pat. No. 5,304,786.
  • The known moving laser beam reader generally includes a scan laser for emitting a laser beam, a focusing lens assembly for focusing the laser beam to form a beam spot having a certain size at a focal plane in a range of working distances, a scan component for repetitively scanning the beam spot across a target symbol in a laser scan pattern, for example, a scan line or a series of scan lines, across the target symbol multiple times per second, e.g., forty times per second, a photodetector for detecting light reflected and/or scattered from the symbol and for converting the detected light into an analog electrical signal, and signal processing circuitry including a digitizer for digitizing the analog signal, and a microprocessor for decoding the digitized signal based upon a specific symbology used for the symbol.
  • The known imaging reader generally includes a solid-state imager or sensor having an array of cells or photosensors, which correspond to image elements or pixels in a field of view of the imager, an illuminating light assembly for illuminating the field of view with illumination light from an illumination light source, e.g., one or more light emitting diodes (LEDs), an imaging lens assembly for capturing return ambient and/or illumination light scattered and/or reflected from the symbol being imaged over a range of working distances, and an aiming light assembly for projecting an aiming laser light pattern or mark with aiming laser light from an aiming light source, e.g., an aiming laser, on the symbol prior to imaging. The imager may include a one- or two-dimensional charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device and associated circuits for producing electronic signals corresponding to a one- or two-dimensional array of pixel information over the field of view.
  • Both types of readers are often operated by being held in a human operator's hand and aimed at each symbol to be read. Visibility of the laser scan pattern in the moving laser beam reader or of the aiming laser light pattern in the imaging reader is important to insure that the operator accurately positions the respective pattern on and across the symbol to be read. However, sometimes, such laser light patterns are not readily visible to the operator.
  • For example, some semiconductor laser diodes emit laser light at a wavelength of about 7800 Angstrom units, which is very close to infrared light and is on the borderline of being visible. Even with the advent of laser diodes that emit light in the visible wavelength range, ambient light, such as outdoor sunlight or a brightly lit indoor environment, tends to mask out the laser diode light. Furthermore, if the laser diode light is moving, for example, by being swept across the symbol, and especially if the laser diode light is being swept at fast rates of speed on the order of a plurality of times per second, for example, at a rate of 40 scan lines per second and more, then the laser diode light is not readily visible to the operator, even in a darkened room. Hence, due to one or more of such factors as the wavelength of the laser light, the intensity of the laser light, the intensity of the ambient light in the environment in which the laser light is operating, the scanning rate, as well as other factors, the visibility of the laser patterns is degraded.
  • These non-readily visible laser patterns sometimes causes the operator to hunt around by trial and error, hope that the laser pattern is eventually properly positioned on and across the symbol, and wait until the reader advises, typically by the lighting of an indicator lamp or by the sounding of an auditory beeper, that the symbol had indeed been successfully read. This hunting technique is a less-than-efficient and time-consuming procedure for reading symbols, particularly in those applications where a multitude of symbols has to be read every hour and every day.
  • Increasing the intensity or brightness of the laser beam emitted by the scan laser or of the aiming light emitted by the aiming laser will increase the beam visibility. However, increasing the laser light intensity too much may violate human eye exposure laser safety standard limits. For example, a class 2 laser is limited to an output power of 1 mW over a base time interval of 250 msec, and a class 1 laser is limited to an output power of 0.39 mW over a base time interval of 10 sec. The laser light intensity cannot exceed these limits.
  • Accordingly, there is a need for enhancing the visibility of such laser patterns, without violating human eye exposure safety limit standards, and for enabling such readers to be readily operated outdoors in sunlight and in brightly lit indoor environments.
  • SUMMARY OF THE INVENTION
  • This invention relates to a reader for electro-optically reading a target, such as one- and/or two-dimensional bar code symbols, as well as non-symbols. The reader includes a housing, preferably one having a handle for handheld operation by an operator, and a data capture assembly supported by the housing and operative for directing laser light having a laser wavelength in a laser light pattern to the symbol, and for detecting return light from the symbol.
  • In one embodiment, the reader is a moving laser beam reader, which includes a scan laser for emitting the laser light as a laser beam, a scanner for sweeping the laser beam across the symbol to form the laser light pattern as a scan pattern for reflection and scattering as the return light, and a detector for detecting the return light. In another embodiment, the reader is an imaging reader, which includes an aiming laser for emitting the laser light across the symbol to form the laser light pattern as an aiming pattern, and a solid-state imager, such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device, for detecting the return light.
  • In accordance with one aspect of this invention, an optical element is supported by the housing in a deployed position. The optical element is transmissive to laser light of the same laser wavelength to enable the operator to view the laser light pattern on the symbol through the optical element in the deployed position. The optical element blocks out all other wavelengths of light from other sources, thereby enhancing the visibility of the laser light pattern over other light sources, especially ambient indoor or outdoor light.
  • Preferably, the optical element includes a generally planar filter mounted on the housing for movement between a stored position in which the filter lies in a generally horizontal plane adjacent the housing, and the deployed position in which the filter lies in an upright plane. Advantageously, the filter is pivotably mounted on the housing. A cover may be provided to at least partly surround the housing, in which case the filter is pivotably mounted on the cover. The cover includes a closure for securing the cover onto the housing. This latter construction is particularly beneficial for retrofitting existing readers, as opposed to new readers in which the optical element is built into the reader at the factory. Alternatively, the housing may be provided with a mounting slot, in which case the filter is pivotably mounted on a mounting tab that is received in the mounting slot. In another variant, the filter is mounted on a sleeve that is mounted on the housing with a snap action.
  • Another feature of this invention resides, briefly stated, in a method of enhancing visibility of a laser light pattern on a symbol to be read by a hand-held, electro-optical reader. The method is performed by directing laser light having a laser wavelength in the laser light pattern to the symbol, configuring an optical element to be transmissive to laser light of the same laser wavelength, supporting the optical element in a deployed position by the reader, and viewing the laser light pattern on the symbol through the optical element in the deployed position.
  • The novel features which are considered as characteristic of the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic diagram of a handheld moving laser beam reader for electro-optically reading a symbol in accordance with the prior art;
  • FIG. 2 is a schematic diagram of a handheld imaging reader for electro-optically reading a symbol in accordance with the prior art;
  • FIG. 3 is a perspective view depicting how an optical element in a deployed position enhances visibility of a laser light pattern generated by either the reader of FIG. 1 or the reader of FIG. 2 in accordance with one embodiment of the present invention;
  • FIG. 4 is a perspective overhead view of another embodiment of an optical element in a deployed position in isolation in accordance with the present invention;
  • FIG. 5 is a perspective view from below of the embodiment of FIG. 4;
  • FIG. 6 is an exploded perspective view of yet another embodiment of an optical element for mounting on a reader in accordance with the present invention;
  • FIG. 7 is a perspective view of the embodiment of FIG. 6 in a deployed position; and
  • FIG. 8 is a perspective view of the embodiment of FIG. 6 in a stored position.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • FIG. 1 depicts a known moving laser beam reader 40 for electro-optically reading a target or indicia, such as a symbol, that may use, and benefit from, the present invention. The laser beam reader 40 includes a scanner 62 in a handheld housing 42 having a handle 44 on which a trigger 10 for initiating reading is mounted. The scanner 62 is operative for scanning an outgoing laser beam from a scan laser 64 and/or a field of view of a light detector or photodiode 66 in a scan laser light pattern, typically comprised of one or more scan lines, multiple times per second, for example, forty times per second, through a housing window 46 across the symbol for reflection or scattering therefrom as return light detected by the photodiode 66 during reading. The laser beam reader 40 also includes a focusing lens assembly or optics 61 for optically modifying the outgoing laser beam to have a large depth of field, and a digitizer 68 for converting an electrical analog signal generated by the detector 66 from the return light into a digital signal for subsequent decoding by a microprocessor or controller 70 into data indicative of the symbol being read.
  • In operation of the laser beam reader 40, the controller 70 sends a command signal to drive the scan laser 64 and the scanner 62 to project the scan laser light pattern away from the reader 40. The operator must be able to see the laser scan pattern to accurately position the laser scan pattern on and across the symbol to be read.
  • FIG. 2 depicts a known imaging reader 50 for imaging targets, such as indicia or symbols to be electro-optically read, as well as non-symbols, which may use, and benefit from, the present invention. The imaging reader 50 includes a one- or two-dimensional, solid-state imager 30, preferably a CCD or a CMOS array, mounted in the handheld housing 42 having the handle 44 on which the trigger 10 for initiating reading is mounted. The imager 30 has an array of image sensors operative, together with an imaging lens assembly 31, for capturing return light reflected and/or scattered from the target through the housing window 46 during the imaging to produce an electrical signal indicative of a captured image for subsequent decoding by the controller 70 into data indicative of the symbol being read, or into a picture of the target.
  • When the reader 50 is operated in low light or dark ambient environments, the imaging reader 50 includes an illuminator 32 for illuminating the target during the imaging with illumination light directed from an illumination light source through the window 46. Thus, the return light may be derived from the illumination light and/or ambient light. The illumination light source comprises one or more light emitting diodes (LEDs). An aiming laser light assembly is also provided for projecting an aiming laser light pattern or mark with aiming laser light from an aiming light source, e.g., an aiming laser 34, on the target prior to imaging.
  • In operation of the imaging reader 50, the controller 70 sends a command signal to initially drive the aiming laser 34 to project the aiming laser light pattern on the target. The operator must be able to see the aiming laser light pattern to accurately position the aiming laser light pattern on and across the target to be imaged. Then, the controller 70 sends a command signal to drive the illuminator LEDs 32 for a short time period, say 500 microseconds or less, and energizes the imager 30 during an exposure time period of a frame to collect light from the target during said time period. A typical array needs about 16-33 milliseconds to read the entire target image and operates at a frame rate of about 30-60 frames per second. The array may have on the order of one million addressable image sensors.
  • In accordance with one aspect of this invention, it is desired to enhance the visibility of the laser scan pattern or the aiming laser light pattern, despite the presence of other bright light sources, especially ambient indoor or outdoor light, by supporting an optical element 80 (see FIG. 3) by the housing 42 in a deployed position. The optical element 80 is transmissive to the laser light of the same laser wavelength to enable an operator, as represented by an eye 82 in FIG. 3, to view the laser light pattern on the symbol or target along a direct line-of-sight 84 through the optical element 80 in the deployed position illustrated in FIG. 3. For example, if the scan laser 64 or the aiming laser 34 emits a red beam having a wavelength in a range from about 630 nm to about 740 nm, then the optical element 80 is transmissive to laser light having the same range of wavelengths. The optical element 80 blocks out all other wavelengths of light from other sources outside of this range, thereby enhancing the visibility of the laser light pattern.
  • The optical element 80 of FIG. 3 includes a generally planar filter 86 surrounded by a rectangular frame 88 and mounted on the housing for movement between a stored position and the deployed position. The optical element 80 lies in a generally horizontal plane adjacent the housing 42 in the stored position (compare with FIG. 8), and lies in an upright plane (see FIG. 3) in the deployed position. The upright plane can be vertical or slightly rearwardly or forwardly inclined. The frame 88 is pivotably mounted on the housing 42 by a pair of mounting lugs 90 at opposite sides of, and straddling, the housing 42, and a pair of pivot journals 92 that extend through the lugs 90 and into the housing 42.
  • Another embodiment of an optical element 90 is shown in FIGS. 4-5, in which the frame 88 has been eliminated, and the entire optical element 90 is constituted as a filter. A jacket or cover 92 at least partly surrounds the housing 42, preferably with a snug fit. Preferably, the cover 92 is made of Neoprene (trademark) or like material. The optical element 90 is pivotably mounted on the cover 92 by a pair of mounting lugs 94 at opposite sides of, and straddling, the cover 92, and a pair of pivot journals 94 that extend through the lugs 92 and into the cover 92. As seen in FIG. 4, the cover 92 includes a closure 98 for securing the cover 92 onto the housing 24. Advantageously, the closure 98 is a hook-and-loop-type fastener. This construction is particularly beneficial for retrofitting existing readers, as opposed to new readers in which the optical element is built into the reader at the factory.
  • Still another embodiment of an optical element 100 is shown in FIGS. 6-8, in which the housing 42 is provided with a shoe or mounting slot 120. The optical element 100 of FIGS. 6-8 includes a generally planar filter 102 surrounded by a rectangular frame 104. The frame 104 is pivotably connected by a hinge 108 to a mounting tab 110 that is slidably received in, or slidably removed from, the mounting slot 120. The optical element 100 lies in a generally horizontal plane adjacent the housing 42 in the stored position (see FIG. 8), and lies in an upright plane (see FIG. 7) in the deployed position.
  • It will be understood that each of the elements described above, or two or more together, also may find a useful application in other types of constructions differing from the types described above. For example, the optical element need not be rectangular as shown, but can have a myriad of other shapes, e.g., circular. The optical element need not extend upwardly or be raised in the deployed position, but can extend away from the housing in other directions, e.g., laterally. The optical element may be comprised of a plurality of telescoping portions, in which event the movement between the stored and deployed positions is accomplished not by pivoting the various telescoping portions, but by expanding them apart and collapsing them together. The optical element may be mounted on the housing such that the optical element is at least partly received in the housing in the stored position. In another variant, the optical element may be mounted on a sleeve that is mounted on the housing with a snap action, in which event the optical element is remote from the housing in the stored position. The scan laser 64 or the aiming laser 34 need not emit a red beam, but other wavelengths and ranges are contemplated.
  • While the invention has been illustrated and described as embodied in electro-optical readers, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
  • Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.
  • What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims.

Claims (20)

We claim:
1. A reader for electro-optically reading a symbol, comprising:
a housing held by an operator;
a data capture assembly supported by the housing for directing laser light having a laser wavelength in a laser light pattern to the symbol, and for detecting return light from the symbol; and
an optical element supported by the housing in a deployed position, the optical element being transmissive to laser light of said laser wavelength to enable the operator to view the laser light pattern on the symbol through the optical element in the deployed position.
2. The reader of claim 1, wherein the housing has a handle held by the operator during the reading, and a trigger mounted on the handle for initiating the reading and for actuating a controller to control the data capture assembly.
3. The reader of claim 1, wherein the data capture assembly includes a scan laser for emitting the laser light as a laser beam, a scanner for sweeping the laser beam across the symbol to form the laser light pattern as a scan pattern for reflection and scattering as the return light, and a detector for detecting the return light.
4. The reader of claim 1, wherein the data capture assembly includes an aiming laser for emitting the laser light across the symbol to form the laser light pattern as an aiming pattern, and a solid-state imager for detecting the return light.
5. The reader of claim 1, wherein the optical element includes a generally planar filter mounted on the housing for movement between a stored position in which the filter lies in a generally horizontal plane adjacent the housing, and the deployed position in which the filter lies in an upright plane.
6. The reader of claim 1, wherein the optical element includes a filter pivotably mounted on the housing.
7. The reader of claim 1, wherein the optical element includes a filter, and a cover that at least partly surrounds the housing; and wherein the filter is pivotably mounted on the cover.
8. The reader of claim 7, wherein the cover includes a closure for securing the cover onto the housing.
9. The reader of claim 1, wherein the housing includes a mounting slot; wherein the optical element includes a filter, and a mounting tab received in the mounting slot; and wherein the filter is pivotably mounted on the mounting tab.
10. An accessory for a hand-held, electro-optical reader that directs laser light having a laser wavelength in a laser light pattern to a symbol to be read, the accessory comprising:
an optical element supported by the reader in a deployed position, the optical element being transmissive to laser light of said laser wavelength to enable an operator to view the laser light pattern on the symbol through the optical element in the deployed position.
11. The accessory of claim 10, wherein the optical element includes a generally planar filter mounted on the reader for movement between a stored position in which the filter lies in a generally horizontal plane adjacent the reader, and the deployed position in which the filter lies in an upright plane.
12. The accessory of claim 10, wherein the optical element includes a filter pivotably mounted on the reader.
13. The accessory of claim 10, wherein the optical element includes a filter, and a cover that at least partly surrounds the reader; and wherein the filter is pivotably mounted on the cover.
14. The accessory of claim 10, wherein the reader includes a mounting slot; wherein the optical element includes a filter, and a mounting tab received in the mounting slot; and wherein the filter is pivotably mounted on the mounting tab.
15. A method of enhancing visibility of a laser light pattern on a symbol to be read by a hand-held, electro-optical reader, the method comprising the steps of:
directing laser light having a laser wavelength in the laser light pattern to the symbol;
configuring an optical element to be transmissive to laser light of said laser wavelength;
supporting the optical element in a deployed position by the reader; and
viewing the laser light pattern on the symbol through the optical element in the deployed position.
16. The method of claim 15, wherein the configuring step includes configuring the optical element as a generally planar filter; and mounting the filter on the reader for movement between a stored position in which the filter lies in a generally horizontal plane adjacent the reader, and the deployed position in which the filter lies in an upright plane.
17. The method of claim 15, wherein the configuring step includes configuring the optical element as a filter pivotably mounted on the reader.
18. The method of claim 15, wherein the configuring step includes configuring the optical element as a filter; and at least partly surrounding the reader with a cover; and pivotably mounting the filter on the cover.
19. The method of claim 15, and providing a mounting slot on the reader; wherein the configuring step includes configuring the optical element as a filter with a mounting tab; and receiving the mounting tab in the mounting slot; and pivotably mounting the filter on the mounting tab.
20. The method of claim 15, wherein the viewing step is performed along a direct line-of-sight through the optical element.
US12/868,093 2010-08-25 2010-08-25 Electro-optical reader with enhanced laser light pattern visibility Active 2032-04-05 US8840027B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/868,093 US8840027B2 (en) 2010-08-25 2010-08-25 Electro-optical reader with enhanced laser light pattern visibility

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/868,093 US8840027B2 (en) 2010-08-25 2010-08-25 Electro-optical reader with enhanced laser light pattern visibility

Publications (2)

Publication Number Publication Date
US20120048940A1 true US20120048940A1 (en) 2012-03-01
US8840027B2 US8840027B2 (en) 2014-09-23

Family

ID=45695802

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/868,093 Active 2032-04-05 US8840027B2 (en) 2010-08-25 2010-08-25 Electro-optical reader with enhanced laser light pattern visibility

Country Status (1)

Country Link
US (1) US8840027B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140353377A1 (en) * 2013-05-29 2014-12-04 Symbol Technologies, Inc Transparent display for data collection engine
USD729247S1 (en) * 2014-05-29 2015-05-12 Symbol Technologies, Inc. Mobile computer
USD734339S1 (en) * 2013-12-05 2015-07-14 Hand Held Products, Inc. Indicia scanner
USD734753S1 (en) 2014-04-17 2015-07-21 Faro Technologies, Inc. Laser scanning device
USD826234S1 (en) 2016-04-11 2018-08-21 Hand Held Products, Inc. Indicia scanner
US10386175B2 (en) 2012-05-18 2019-08-20 Acergy France SAS Pipe measurement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD804482S1 (en) * 2016-03-15 2017-12-05 Symbol Technologies, Llc Data capture device
USD832845S1 (en) * 2016-08-01 2018-11-06 Hand Held Products, Inc. Optical scanner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820911A (en) * 1986-07-11 1989-04-11 Photographic Sciences Corporation Apparatus for scanning and reading bar codes
US6431768B1 (en) * 1999-03-25 2002-08-13 Ricoh Company, Ltd. Digital camera having rotatable optical viewfinder unit
US20050035204A1 (en) * 2003-06-30 2005-02-17 Knappert Michael L. Apparatus for aiming a scanner
US20080142597A1 (en) * 2006-12-18 2008-06-19 Eugene Joseph Aiming system and method for diffuser illumination systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794239A (en) 1987-10-13 1988-12-27 Intermec Corporation Multitrack bar code and associated decoding method
US5410141A (en) * 1989-06-07 1995-04-25 Norand Hand-held data capture system with interchangable modules
US5304786A (en) 1990-01-05 1994-04-19 Symbol Technologies, Inc. High density two-dimensional bar code symbol
US5793033A (en) * 1996-03-29 1998-08-11 Metanetics Corporation Portable data collection device with viewing assembly
US7350711B2 (en) * 2006-02-28 2008-04-01 Symbol Technologies, Inc. Ambient light shield and color filter for imaging-based bar code reader
US7688524B2 (en) 2008-04-24 2010-03-30 Sperian Eye & Face Protection, Inc. Laser protective eyewear having improved glare protection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820911A (en) * 1986-07-11 1989-04-11 Photographic Sciences Corporation Apparatus for scanning and reading bar codes
US6431768B1 (en) * 1999-03-25 2002-08-13 Ricoh Company, Ltd. Digital camera having rotatable optical viewfinder unit
US20050035204A1 (en) * 2003-06-30 2005-02-17 Knappert Michael L. Apparatus for aiming a scanner
US20080142597A1 (en) * 2006-12-18 2008-06-19 Eugene Joseph Aiming system and method for diffuser illumination systems

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10386175B2 (en) 2012-05-18 2019-08-20 Acergy France SAS Pipe measurement
US20140353377A1 (en) * 2013-05-29 2014-12-04 Symbol Technologies, Inc Transparent display for data collection engine
US9010642B2 (en) * 2013-05-29 2015-04-21 Symbol Technologies, Inc. Transparent display for data collection engine
USD734339S1 (en) * 2013-12-05 2015-07-14 Hand Held Products, Inc. Indicia scanner
USD753660S1 (en) * 2013-12-05 2016-04-12 Hand Held Products, Inc. Indicia scanner
USD734753S1 (en) 2014-04-17 2015-07-21 Faro Technologies, Inc. Laser scanning device
USD729247S1 (en) * 2014-05-29 2015-05-12 Symbol Technologies, Inc. Mobile computer
USD826234S1 (en) 2016-04-11 2018-08-21 Hand Held Products, Inc. Indicia scanner

Also Published As

Publication number Publication date
US8840027B2 (en) 2014-09-23

Similar Documents

Publication Publication Date Title
US7237722B2 (en) Hand-supported imaging-based bar code symbol reader employing a multi-mode image-processing based bar code reading subsystem with modular image-processing architecture
US7347374B2 (en) Hand-supportable digital imaging-based bar code symbol reader employing an event-driven system control subsystem, automatic IR-based object detection, and trigger-switch activated image capture and processing subsystem
US6318635B1 (en) Multi-focal length imaging based portable dataform reader
CA2156153C (en) Method and apparatus for illumination and imaging of a surface
US8998091B2 (en) Hybrid-type bioptical laser scanning and digital imaging system supporting automatic object motion detection at the edges of a 3D scanning volume
US8561905B2 (en) Hybrid-type bioptical laser scanning and digital imaging system supporting automatic object motion detection at the edges of a 3D scanning volume
US7204418B2 (en) Pulsed illumination in imaging reader
JP3734856B2 (en) Information reading device and its reading method
EP1281271B1 (en) Coplanar camera scanning system
US6866198B2 (en) Imaging bar code reader with moving beam simulation
US20060163355A1 (en) Data reader and methods for imaging targets subject to specular reflection
CN102369538B (en) Auto-exposure for multi-imager barcode reader
US6899271B2 (en) Arrangement for and method of collecting and displaying information in real time along a line of sight
CN202563519U (en) Code symbol read system based on digital imaging
CN102842023B (en) Hybrid dual laser scanning and imaging optical system
US8985456B2 (en) Auto-exposure method using continuous video frames under controlled illumination
US8459557B2 (en) Dual laser scanning code symbol reading system employing automatic object presence detector for automatic laser source selection
US20120193423A1 (en) Code symbol reading system supporting operator-dependent system configuration parameters
US20130175341A1 (en) Hybrid-type bioptical laser scanning and digital imaging system employing digital imager with field of view overlapping field of field of laser scanning subsystem
US6637658B2 (en) Optical reader having partial frame operating mode
US9639726B2 (en) Code symbol reading system having adjustable object detection
US5821518A (en) Method and apparatus for a portable non-contact label imager
US9773142B2 (en) System and method for selectively reading code symbols
US8523076B2 (en) Omnidirectional laser scanning bar code symbol reader generating a laser scanning pattern with a highly non-uniform scan density with respect to line orientation
EP1397773B1 (en) Omni-directional optical code reader using scheimpflug optics

Legal Events

Date Code Title Description
AS Assignment

Owner name: SYMBOL TECHNOLOGIES, INC., NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHAUMONT, CHAD;BROCK, CHRISTOPHER WARREN;JENKINS, IAN;AND OTHERS;REEL/FRAME:024885/0351

Effective date: 20100806

STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: MORGAN STANLEY SENIOR FUNDING, INC. AS THE COLLATE

Free format text: SECURITY AGREEMENT;ASSIGNORS:ZIH CORP.;LASER BAND, LLC;ZEBRA ENTERPRISE SOLUTIONS CORP.;AND OTHERS;REEL/FRAME:034114/0270

Effective date: 20141027

AS Assignment

Owner name: SYMBOL TECHNOLOGIES, LLC, NEW YORK

Free format text: CHANGE OF NAME;ASSIGNOR:SYMBOL TECHNOLOGIES, INC.;REEL/FRAME:036083/0640

Effective date: 20150410

AS Assignment

Owner name: SYMBOL TECHNOLOGIES, INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:MORGAN STANLEY SENIOR FUNDING, INC.;REEL/FRAME:036371/0738

Effective date: 20150721

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551)

Year of fee payment: 4